Help help please it due rn?​

Jordan got 27 out of 90 correct on his test . what fraction of the marks did her get correct

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?

What is the simplified form of square root of 400 to the 100th power ?